类的反射
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2022-05-13 17:42:27
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package com.funo.web_frame.test; import java.lang.reflect.Field; public class Engine { private String engineId; private String engineName; private String engineType; public static void main(String[] args) throws Exception { // Engine3 m = new Engine3(); Engine m = new Engine(); m.engineId="dddd"; Engine.getNamesValues(m, "==================="); } /** * 获取对象 所以属性值与属性 在同一个类中 属性为private 可以获取 * 不同类中或者包中 private 属性值无法获取 * @param o * @param s */ public static void getNamesValues(Object o, String s) { Field[] f = o.getClass().getDeclaredFields(); Object[] value = new Object[f.length]; String name[] = new String[f.length]; for (int i = 0; i < f.length; i++) { name[i] = f[i].getName(); try { value[i] = f[i].get(o); } catch (Exception e) { e.printStackTrace(); } System.out.println("name:" + name[i]); System.out.println("Value:" + value[i]); } } } ===================通过类的 set get 方法获取========================== @SuppressWarnings("unchecked") public static void getNamesValues(Object o ,String s) { System.out.println("****************"+s+"*****************"); Field[] f = o.getClass().getDeclaredFields(); Class classType = o.getClass(); Object[] value = new Object[f.length]; for (int i = 0; i < f.length; i++) { String fieldName = f[i].getName(); String firstLetter = fieldName.substring(0, 1).toUpperCase(); String getMethodName = "get" + firstLetter + fieldName.substring(1); Method getMethod; try { getMethod = classType.getMethod(getMethodName, new Class[] {}); value[i] = getMethod.invoke(o, new Object[] {}); } catch (Exception e) { } System.out.println(fieldName+" = "+value[i]); } }
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